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/*
* arch/arm/mach-tegra/io.c
*
* Copyright (C) 2010 Google, Inc.
*
* Author:
* Colin Cross <ccross@google.com>
* Erik Gilling <konkers@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/io.h>
#include <asm/page.h>
#include <asm/mach/map.h>
#include "board.h"
static struct map_desc tegra_io_desc[] __initdata = {
{
.virtual = IO_PPSB_VIRT,
.pfn = __phys_to_pfn(IO_PPSB_PHYS),
.length = IO_PPSB_SIZE,
.type = MT_DEVICE,
},
{
.virtual = IO_APB_VIRT,
.pfn = __phys_to_pfn(IO_APB_PHYS),
.length = IO_APB_SIZE,
.type = MT_DEVICE,
},
{
.virtual = IO_CPU_VIRT,
.pfn = __phys_to_pfn(IO_CPU_PHYS),
.length = IO_CPU_SIZE,
.type = MT_DEVICE,
},
{
.virtual = IO_IRAM_VIRT,
.pfn = __phys_to_pfn(IO_IRAM_PHYS),
.length = IO_IRAM_SIZE,
.type = MT_DEVICE,
},
{
.virtual = IO_HOST1X_VIRT,
.pfn = __phys_to_pfn(IO_HOST1X_PHYS),
.length = IO_HOST1X_SIZE,
.type = MT_DEVICE,
},
{
.virtual = IO_USB_VIRT,
.pfn = __phys_to_pfn(IO_USB_PHYS),
.length = IO_USB_SIZE,
.type = MT_DEVICE,
},
{
.virtual = IO_SDMMC_VIRT,
.pfn = __phys_to_pfn(IO_SDMMC_PHYS),
.length = IO_SDMMC_SIZE,
.type = MT_DEVICE,
},
};
void __init tegra_map_common_io(void)
{
iotable_init(tegra_io_desc, ARRAY_SIZE(tegra_io_desc));
}
/*
* Intercept ioremap() requests for addresses in our fixed mapping regions.
*/
void __iomem *tegra_ioremap(unsigned long p, size_t size, unsigned int type)
{
void __iomem *v = IO_ADDRESS(p);
/*
* __arm_ioremap fails to set the domain of ioremapped memory
* correctly, only use it on physical memory.
*/
if (v == NULL && p < SZ_1G)
v = __arm_ioremap(p, size, type);
/*
* If the physical address was not physical memory or statically
* mapped, there's nothing we can do to map it safely.
*/
BUG_ON(v == NULL);
return v;
}
EXPORT_SYMBOL(tegra_ioremap);
void tegra_iounmap(volatile void __iomem *addr)
{
unsigned long virt = (unsigned long)addr;
if (virt >= VMALLOC_START && virt < VMALLOC_END)
__iounmap(addr);
}
EXPORT_SYMBOL(tegra_iounmap);
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